I know there’s hardly any air flow through the the vent lines, just to release any pressure from heat, but I don’t really like having the vent lines open to allow any water or dirt to get in. So I took some open cell foam and added some foam air filter oil, and cut them to size to fit in the vent line. I know it’s probably not going to keep the water out if you submerge the ATV, but it’ll keep any from splashing in there if it gets close. I guess it just makes me feel little bit better having something in the vent line.
